My 7i76e Connection Sheet

i'm working on a mill (cincinnati cim-x) there is no encoder on the mill-axis and mechanical nearly inposible to place it there
can it also work when i place the encoder on the motor and add some lines in the hal (an idea of what lines)
i like to use rigide tapping
how many puls do in need maybe 2 or 3 magnetic sensor placed on a gear in the gearbox can also work ?

fons wrote: i'm working on a mill (cincinnati cim-x) there is no encoder on the mill-axis and mechanical nearly inposible to place it there
can it also work when i place the encoder on the motor

I think that there are probably more CNC machines with the encoder on the motor than on tha axis.

Encoders on the motor works fine, and needs no special config.

when you use rigid taping the system need to know the puls/ revolution
there is a gearbox with 16 speeds
when the encoder is placed on the spindel its always the same value of pulses
not with a gearbox place in different gears
or does it mathers ? what i don't believe

fons wrote: when you use rigid taping the system need to know the puls/ revolution
there is a gearbox with 16 speeds
when the encoder is placed on the spindel its always the same value of pulses
not with a gearbox place in different gears
or does it mathers ? what i don't believe

The spindle encoder needs to be on the spindle, yes.

But there was nothing in your previous post to suggest that you were talking about a spindle.

what is the min of puls to work propper i have to make one by meselve at the outside of the gearboc
can 180puls/rev be enough ?

fons wrote: what is the min of puls to work propper i have to make one by meselve at the outside of the gearboc
can 180puls/rev be enough ?

50 is enough for lathe threading or for gar hobbing, as at a constant speed LinuxCNC can interpolate the output from a low-count encoder.
For rigid-tapping you need to know exactly when the spindle reverses.
With 180 counts you can have (about) 2 degrees of uncertainly in the reversal position.
Does this matter? Quite possibly not. The effect is to give a slightly sloppy thread (assuming perfect Z-axis tracking) but 2 degrees with a 1mm pitch tap is only 5 microns error.